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import * as core from '@actions/core';

import * as finder from './find-python';

import * as finderPyPy from './find-pypy';

import * as finderGraalPy from './find-graalpy';

import * as path from 'path';

import * as os from 'os';

import fs from 'fs';

import {getCacheDistributor} from './cache-distributions/cache-factory';

import {

isCacheFeatureAvailable,

logWarning,

IS_MAC,

getVersionInputFromFile,

getVersionsInputFromPlainFile

} from './utils';

function isPyPyVersion(versionSpec: string) {

return versionSpec.startsWith('pypy');

}

function isGraalPyVersion(versionSpec: string) {

return versionSpec.startsWith('graalpy');

}

export async function cacheDependencies(cache: string, pythonVersion: string) {

const cacheDependencyPath =

core.getInput('cache-dependency-path') || undefined;

let resolvedDependencyPath: string | undefined = undefined;

if (cacheDependencyPath) {

const actionPath = process.env.GITHUB_ACTION_PATH || '';

const workspace = process.env.GITHUB_WORKSPACE || process.cwd();

const sourcePath = path.resolve(actionPath, cacheDependencyPath);

const relativePath = path.relative(actionPath, sourcePath);

const targetPath = path.resolve(workspace, relativePath);

try {

const sourceExists = await fs.promises

.access(sourcePath, fs.constants.F_OK)

.then(() => true)

.catch(() => false);

if (!sourceExists) {

core.warning(

`The resolved cache-dependency-path does not exist: ${sourcePath}`

);

} else {

if (sourcePath !== targetPath) {

const targetDir = path.dirname(targetPath);

// Create target directory if it doesn't exist

await fs.promises.mkdir(targetDir, {recursive: true});

// Copy file asynchronously

await fs.promises.copyFile(sourcePath, targetPath);

core.info(`Copied ${sourcePath} to ${targetPath}`);

} else {

core.info(

`Dependency file is already inside the workspace: ${sourcePath}`

);

}

resolvedDependencyPath = path

.relative(workspace, targetPath)

.replace(/\\/g, '/');

core.info(`Resolved cache-dependency-path: ${resolvedDependencyPath}`);

}

} catch (error) {

core.warning(

`Failed to copy file from ${sourcePath} to ${targetPath}: ${error}`

);

}

}

// Pass resolvedDependencyPath if available, else fallback to original input

const dependencyPathForCache = resolvedDependencyPath ?? cacheDependencyPath;

const cacheDistributor = getCacheDistributor(

cache,

pythonVersion,

dependencyPathForCache

);

await cacheDistributor.restoreCache();

}

function resolveVersionInputFromDefaultFile(): string[] {

const couples: [string, (versionFile: string) => string[]][] = [

['.python-version', getVersionsInputFromPlainFile]

];

for (const [versionFile, _fn] of couples) {

logWarning(

`Neither 'python-version' nor 'python-version-file' inputs were supplied. Attempting to find '${versionFile}' file.`

);

if (fs.existsSync(versionFile)) {

return _fn(versionFile);

} else {

logWarning(`${versionFile} doesn't exist.`);

}

}

return [];

}

function resolveVersionInput() {

let versions = core.getMultilineInput('python-version');

const versionFile = core.getInput('python-version-file');

if (versions.length) {

if (versionFile) {

core.warning(

'Both python-version and python-version-file inputs are specified, only python-version will be used.'

);

}

} else {

if (versionFile) {

if (!fs.existsSync(versionFile)) {

throw new Error(

`The specified python version file at: ${versionFile} doesn't exist.`

);

}

versions = getVersionInputFromFile(versionFile);

} else {

versions = resolveVersionInputFromDefaultFile();

}

}

return versions;

}

async function run() {

if (IS_MAC) {

process.env['AGENT_TOOLSDIRECTORY'] = '/Users/runner/hostedtoolcache';

}

if (process.env.AGENT_TOOLSDIRECTORY?.trim()) {

process.env['RUNNER_TOOL_CACHE'] = process.env['AGENT_TOOLSDIRECTORY'];

}

core.debug(

`Python is expected to be installed into ${process.env['RUNNER_TOOL_CACHE']}`

);

try {

const versions = resolveVersionInput();

const checkLatest = core.getBooleanInput('check-latest');

const allowPreReleases = core.getBooleanInput('allow-prereleases');

const freethreaded = core.getBooleanInput('freethreaded');

if (versions.length) {

let pythonVersion = '';

const arch: string = core.getInput('architecture') || os.arch();

const updateEnvironment = core.getBooleanInput('update-environment');

core.startGroup('Installed versions');

for (const version of versions) {

if (isPyPyVersion(version)) {

const installed = await finderPyPy.findPyPyVersion(

version,

arch,

updateEnvironment,

checkLatest,

allowPreReleases

);

pythonVersion = `${installed.resolvedPyPyVersion}-${installed.resolvedPythonVersion}`;

core.info(

`Successfully set up PyPy ${installed.resolvedPyPyVersion} with Python (${installed.resolvedPythonVersion})`

);

} else if (isGraalPyVersion(version)) {

const installed = await finderGraalPy.findGraalPyVersion(

version,

arch,

updateEnvironment,

checkLatest,

allowPreReleases

);

pythonVersion = `${installed}`;

core.info(`Successfully set up GraalPy ${installed}`);

} else {

if (version.startsWith('2')) {

core.warning(

'The support for python 2.7 was removed on June 19, 2023. Related issue: https://github.com/actions/setup-python/issues/672'

);

}

const installed = await finder.useCpythonVersion(

version,

arch,

updateEnvironment,

checkLatest,

allowPreReleases,

freethreaded

);

pythonVersion = installed.version;

core.info(`Successfully set up ${installed.impl} (${pythonVersion})`);

}

}

core.endGroup();

const cache = core.getInput('cache');

if (cache && isCacheFeatureAvailable()) {

await cacheDependencies(cache, pythonVersion);

}

} else {

core.warning(

'The `python-version` input is not set. The version of Python currently in `PATH` will be used.'

);

}

const matchersPath = path.join(__dirname, '../..', '.github');

core.info(`##[add-matcher]${path.join(matchersPath, 'python.json')}`);

} catch (err) {

core.setFailed((err as Error).message);

}

}

run();